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FAN5365UC03X PDF预览

FAN5365UC03X

更新时间： 2024-09-26 10:28:11
品牌 Logo 应用领域
飞兆/仙童 - FAIRCHILD 稳压器
页数 文件大小 规格书
24页 1014K
描述
1A / 0.8A, 6MHz Digitally Programmable Regulator

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FAN5365UC03X 数据手册

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November 2010  
FAN5365  
1A / 0.8A, 6MHz Digitally Programmable Regulator  
Features  
Description  
The FAN5365 is a high-frequency, ultra-fast transient  
response, synchronous step-down, DC-DC converter  
optimized for low-power applications using small, low-cost  
inductors and capacitors. The FAN5365 supports up to  
800mA or 1A load current.  
ƒ High Efficiency (>88%) at 6MHz  
ƒ 800mA or 1A Output Current  
ƒ Regulation Maintained with VIN from 2.3V to 5.5V  
ƒ 6-Bit VOUT Programmable from 0.75 to 1.975V  
ƒ 6MHz Fixed-Frequency Operation (PWM Mode)  
ƒ Excellent Load and Line Transient Response  
ƒ Small Size, 470nH Inductor Solution  
The FAN5365 is ideal for mobile phones and similar portable  
applications powered by a single-cell Lithium-Ion battery.  
With an output voltage range adjustable via I2C™ interface  
from 0.75V to 1.975V, it supports low-voltage DSPs and  
processors, core power supplies, and memory modules in  
smart phones, data cards, and hand-held computers.  
ƒ ±2% DC Voltage Accuracy in PWM Mode  
ƒ 25ns Minimum On-Time  
The FAN5365 operates at 6MHz (nominal) fixed switching  
frequency in PWM mode.  
ƒ High-Efficiency, Low-Ripple, Light-Load PFM  
ƒ Smooth Transition between PWM and PFM  
ƒ 40μA Operating PFM Quiescent Current  
ƒ I2C™-Compatible Interface up to 3.4Mbps  
ƒ Pin-Selectable or I2C™ Programmable Output Voltage  
ƒ 9-Bump, 1.27 x 1.29mm, 0.4mm Pitch WLCSP Package  
During light-load conditions, the regulator includes a PFM  
mode to enhance light-load efficiency. The regulator  
transitions smoothly between PWM and PFM modes with no  
glitches on VOUT. In hardware shutdown, the current  
consumption is reduced to less than 200nA.  
The serial interface is compatible with fast / standard mode,  
fast mode plus, and high-speed mode I2C specifications,  
allowing transfers up to 3.4Mbps. This interface is used for  
dynamic voltage scaling with 12.5mV voltage steps, for  
reprogramming the mode of operation (PFM or forced  
PWM), or to disable/enable the output voltage.  
Applications  
ƒ 3G, WiFi®, WiMAX™, and WiBro® Data Cards  
ƒ Netbooks®, Ultra-Mobile PCs  
The chip's advanced protection features include short-circuit  
protection and current and temperature limits. During a  
sustained over-current event, the IC shuts down and restarts  
after a delay to reduce average power dissipation into a  
fault.  
ƒ SmartReflex™-Compliant Power Supply  
ƒ Split Supply DSPs and μP Solutions OMAP™, XSCALE™  
ƒ Handset Graphic Processors (NVIDIA®, ATI)  
During startup, the IC controls the output slew rate to  
minimize input current and output overshoot at the end of  
soft-start. The IC maintains a consistent soft-start ramp,  
regardless of output load during startup.  
The FAN5365 is available in a 1.27 x 1.29mm, 9-bump  
WLCSP package.  
All trademarks are the property of their respective owners  
© 2008 Fairchild Semiconductor Corporation  
FAN5365 • Rev. 1.0.4  
www.fairchildsemi.com  
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